Tray type flame-retardant battery cluster

Abstract

The invention relates to a tray type flame-retardant battery cluster which comprises a battery cluster flame-retardant outer plate, a plurality of groups of liquid cooling plates and battery cell modules are arranged on the inner side of the battery cluster flame-retardant outer plate, the plurality of groups of battery cell modules are respectively located on the plurality of groups of liquid cooling plates, a first mounting frame and a second mounting frame are arranged on the battery cluster flame-retardant outer plate, an intervention assembly is arranged on the first mounting frame, and a second intervention assembly is arranged on the second mounting frame. A plurality of temperature sensors and a plurality of gas sensors are respectively mounted on the second mounting frame, and the intervention assembly comprises a fire extinguishing system used for extinguishing fire of the battery cell module and preventing open fire regeneration and a ventilation system used for discharging flammable and explosive gas in time. The first mounting rack, the second mounting rack and the sensor are matched with the intervention assembly, so that when the battery cluster has a thermal runaway accident, open fire extinguishing or regeneration can be carried out at the first time by utilizing the intervention assembly, meanwhile, active intervention pumping and drainage of flammable and explosive gas can be realized, the thermal runaway accident can be effectively controlled at the first time, and the safety of the battery cluster is ensured. The economic loss is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery energy storage, and in particular to a tray-type flame-retardant battery cluster. Background Art Due to increasingly stringent carbon emission requirements, coupled with the reduction in the cost of electrochemical energy storage and the maturity of production and manufacturing processes, the application of large-scale electrochemical energy storage is also increasing. With the development of the electrochemical energy storage industry, low-cost electrochemical energy storage products are becoming more and more sought after by various manufacturers. At the same time, electrochemical energy storage products have also exposed many safety issues. These safety issues have caused a large amount of property losses and casualties. Therefore, the pursuit of low cost and safety of energy storage products has attracted more and more attention.

[0002] When thermal runaway occurs in typical energy storage products, the battery cells will spray flammable and explosive gases and electrolytes, causing the battery cells to short-circuit, spark, and cause fire and explosion. This can also cause thermal runaway reactions in adjacent battery clusters, resulting in a chain reaction of safety accidents and greater harm to the energy storage product. Therefore, how to solve the safety problem of energy storage products is an urgent issue for those skilled in the art. Summary of the Invention

[0003] Based on the above description, the present invention provides a tray-type flame-retardant battery cluster to solve the problem that traditional battery clusters cannot achieve timely intervention when thermal runaway accidents occur.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a tray-type flame-retardant battery cluster, comprising a flame-retardant outer plate of a battery cluster, wherein a plurality of groups of liquid cooling plates and battery cell modules are provided on the inner side of the flame-retardant outer plate of the battery cluster, and the plurality of groups of battery cell modules are respectively located on the plurality of groups of liquid cooling plates, and a first mounting bracket and a second mounting bracket are provided on the flame-retardant outer plate of the battery cluster, wherein the first mounting bracket is provided with an intervention component, and the second mounting bracket is respectively provided with a plurality of temperature sensors and a plurality of gas sensors for monitoring the temperature and gas content of the surrounding environment, wherein the intervention component comprises a fire-fighting system for extinguishing the fire of the battery cell module and preventing the regeneration of the open flame, and a ventilation system for timely discharging flammable and explosive gases.

[0005] On the basis of the above technical solution, the present invention can also be improved as follows.

[0006] Furthermore, the fire protection system includes a fire protection pipe, a fire protection agent nozzle and a first solenoid valve. The fire protection pipe is embedded in the embedded inner cavity between the first mounting frame and the flame-retardant outer panel of the battery cluster. The inlet end of the fire protection pipe is used to connect to the water source. Multiple fire protection agent nozzles are installed at intervals on the fire protection pipe. The first solenoid valve is installed at the inlet end of the fire protection pipe. The temperature sensor is electrically connected to the first solenoid valve. When the temperature sensor detection data is greater than a threshold, the first solenoid valve opens.

[0007] Furthermore, the ventilation system includes a first exhaust duct and a second exhaust duct, the first exhaust duct is connected to the first mounting bracket along the transverse direction, the second exhaust duct is connected to the flame-retardant outer panel of the battery cluster, the first exhaust duct and the second exhaust duct are connected by a connecting pipe, a second solenoid valve is also installed on the connecting pipe, and a fan is also installed on the first exhaust duct. Multiple gas sensors are electrically connected to the second solenoid valve and the fan. When the gas sensor detects flammable and explosive gases, the second solenoid valve and the fan start to operate.

[0008] Furthermore, the fire protection pipe is designed in an S-shaped structure and is located on the back of the multiple groups of battery cell modules.

[0009] Furthermore, both sides of the inner wall of the battery cluster flame retardant outer panel are connected with limiting blocks, the side view shape of the limiting blocks is concave structure design, and part of the surface of the second exhaust duct is movably connected between the two limiting blocks.

[0010] Furthermore, the battery cluster flame-retardant outer plate and the top surface of the first mounting frame are penetrated by opening one and opening two, the opening one and opening two are connected to each other, and the opening one and opening two are respectively located above the second exhaust duct and the connecting pipe.

[0011] Furthermore, the second mounting rack is located outside the plurality of liquid cooling plates, and the plurality of temperature sensors are respectively mounted on the left and right sides of the inner wall of the second mounting rack.

[0012] Furthermore, the plurality of gas sensors are respectively located directly above and close to the left and right sides of the plurality of liquid cooling plates, and a plurality of ventilation gaps are vertically provided on the left and right sides of the plurality of liquid cooling plates. When thermal runaway occurs in the battery cell module and flammable and explosive gases are emitted, the hot gas flows upward through the ventilation gaps and contacts the gas sensors.

[0013] Furthermore, multiple battery cluster frames are vertically provided on the left and right sides of the inner wall of the battery cluster flame retardant outer plate, and multiple groups of liquid cooling plates are respectively located between the multiple battery cluster frames, and a distance is left between the left and right sides of the multiple groups of liquid cooling plates and the inner side of the battery cluster flame retardant outer plate through the battery cluster frame.

[0014] Furthermore, multiple groups of the liquid cooling plates and battery cell modules are alternately arranged in a tray shape from bottom to top between multiple battery cluster frames.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: 1. By providing a first mounting bracket, a second mounting bracket, and a temperature sensor in conjunction with the fire protection system, when a thermal runaway accident occurs in the battery cell module within the battery cluster, the temperature sensor that senses the temperature abnormality can immediately transmit the abnormal signal to the first solenoid valve, thereby using the first solenoid valve to control the switch of the fire protection pipe. Through the continuous spraying of the fire protection agent nozzle, the fire protection mist in the fire protection pipe can quickly and sustainably fill the battery cluster, thereby effectively utilizing the fire protection mist to achieve a fire extinguishing effect and prevent the regeneration of open flames within the battery cluster.

[0016] 2. By setting up the first mounting rack, the second mounting rack, the gas sensor and the ventilation system, when the battery module encounters a thermal runaway accident and emits a large amount of flammable and explosive gases, the gas sensor will transmit the monitored signal to the fan, so that the fan will start after receiving the signal, and use the first and second flue gas ducts to quickly remove the harmful gases in the battery cluster. At the same time, through the structural design of the second solenoid valve, when the battery cluster is centrally arranged in a container for common use, other battery clusters can remain closed to the first flue gas duct, thereby improving the exhaust efficiency while preventing flammable and explosive gases from entering other battery clusters.

[0017] 3. Through the design of multiple temperature sensors and multiple gas sensors, the multiple temperature sensors and multiple gas sensors can all play corresponding roles, thereby ensuring that the first solenoid valve, the second solenoid valve and the fan can all receive the corresponding signals in time and operate, reducing the occurrence of the equipment being unable to receive signals and respond due to sensor failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the front view structure of the present invention; Figure 3 This is a schematic diagram of the explosion structure between the flame-retardant outer plate of the battery cluster and the first mounting frame of the present invention; Figure 4 A schematic diagram of the explosion structure between the flame-retardant outer plate of the battery cluster and the first mounting frame from another perspective of the present invention; Figure 5 Schematic diagram of the connection structure between the flame-retardant outer plate of the battery cluster and the second mounting frame of the present invention; Figure 6 It is a schematic diagram of the top view of the structure of the present invention; Figure 7 It is a structural schematic diagram of the connection relationship between the first mounting bracket and the intervention component of the present invention.

[0019] In the accompanying drawings, the components represented by the reference numerals are as follows: 1. Battery cluster flame-retardant outer panel; 10. Intervention assembly; 11. Temperature sensor; 12. Gas sensor; 15. Limit block; 16. Opening one; 2. Battery cluster frame; 3. Liquid cooling plate; 4. Battery cell module; 5. First mounting bracket; 52. Opening two; 6. Second mounting bracket; 7. Firefighting system; 72. Firefighting pipe; 73. Firefighting agent nozzle; 74. First solenoid valve; 8. Ventilation system; 81. First exhaust duct; 82. Second exhaust duct; 83. Connecting pipe; 84. Second solenoid valve. DETAILED DESCRIPTION

[0020] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0022] Example like Figure 1-Figure 7 As shown, this embodiment provides a tray-type flame-retardant battery cluster, including a battery cluster flame-retardant outer plate 1, the battery cluster flame-retardant outer plate 1 is designed with a mica material to reduce the risk of damage to the external battery cluster, and the production cost is low, which is convenient for large-scale production and use. The inner side of the battery cluster flame-retardant outer plate 1 is provided with multiple groups of liquid cooling plates 3 and battery modules 4, and the multiple groups of battery modules 4 are respectively located on the multiple groups of liquid cooling plates 3. The number of liquid cooling plates 3 is 8, and a circulation channel is opened on the liquid cooling plate 3, and the circulation channel is connected to the external water circulation system to realize the operation. The battery module 4 is cooled cyclically during operation to maintain uniform temperature inside the battery cell. Each group of liquid cooling plates 3 contains four battery modules 4, with a single module connected in series and parallel in a 1-in-13 series configuration. 280Ah lithium iron phosphate batteries are used. A first mounting bracket 5 and a second mounting bracket 6 are provided on the battery cluster's flame-retardant outer plate 1. The first mounting bracket 5 is provided with an intervention assembly 10, while the second mounting bracket 6 is provided with multiple temperature sensors 11 and multiple gas sensors 12 for monitoring the ambient temperature and gas content. The intervention component 10 includes a fire protection system 7 for extinguishing the fire of the battery module 4 and preventing the regeneration of open flames, and a ventilation system 8 for timely exhausting flammable and explosive gases; The fire protection system 7 includes a fire protection pipe 72, a fire protection agent nozzle 73, and a first solenoid valve 74. The fire protection pipe 72 is embedded in the inner cavity between the first mounting frame 5 and the battery cluster flame-retardant outer panel 1. The inlet end of the fire protection pipe 72 is connected to a water source. Multiple fire protection agent nozzles 73 are installed on the fire protection pipe 72 at intervals. The first solenoid valve 74 is installed at the inlet end of the fire protection pipe 72. The temperature sensor 11 is electrically connected to the first solenoid valve 74. When the detection data of the temperature sensor 11 is greater than the threshold value, the first solenoid valve 74 opens. If a cell in a cell module 4 in the battery cluster experiences thermal runaway, the cell will release a large amount of heat. After the cell releases the heat, the temperature in the battery cluster rises sharply. Once a temperature sensor 11 mounted on the second mounting bracket 6 detects a temperature anomaly, it quickly sends an abnormality signal to the first solenoid valve 74. Upon receiving the signal, the first solenoid valve 74 opens, causing the firefighting mist in the firefighting pipe 72 to be quickly sprayed into the battery cluster through the multiple firefighting agent nozzles 73, so that the firefighting mist in the battery cluster is quickly filled, thereby extinguishing the open flame or preventing the ignition of the open flame. The ventilation system 8 includes a first exhaust duct 81 and a second exhaust duct 82. The first exhaust duct 81 extends transversely through the first mounting bracket 5, and the second exhaust duct 82 is connected to the flame-retardant outer panel 1 of the battery cluster. The first exhaust duct 81 and the second exhaust duct 82 are connected by a connecting pipe 83. A second solenoid valve 84 is also installed on the connecting pipe 83. A fan (not shown in the figure) is also installed on the first exhaust duct 81. Multiple gas sensors 12 are electrically connected to the second solenoid valve 84 and the fan. When the gas sensor 12 detects flammable or explosive gas, the second solenoid valve 84 and the fan are turned on. Multiple gas sensors 12 monitor the gas composition in the thermal runaway battery cluster. If the release of flammable and explosive gases from the battery cells is detected, the gas sensor 12 transmits an abnormal signal to the second solenoid valve 84 and the external fan in parallel, so that the second solenoid valve 84 and the external fan are opened at the same time, so that the thermal runaway battery cluster is connected through the second exhaust duct 82, the connecting pipe 83 and the first exhaust duct 81, so that the flammable and explosive gases are quickly discharged to the outside through the second exhaust duct 82, the connecting pipe 83 and the first exhaust duct 81.

[0023] like Figure 3 、 Figure 4 and Figure 7 As shown, the fire-fighting pipe 72 is designed in an S-shaped structure. The fire-fighting pipe 72 is located on the back of the multiple groups of battery modules 4, so that the multiple fire-fighting agent nozzles 73 installed on the fire-fighting pipe 72 can be arranged at multiple positions on the back of the multiple groups of battery modules 4, thereby quickly achieving the fire-fighting agent body in the battery cluster module and achieving a fire-fighting effect at a faster speed.

[0024] like Figure 4 and Figure 6 As shown, the left and right sides of the inner wall of the battery cluster flame retardant outer panel 1 are fixedly connected to the limiting blocks 15. The side view shape of the limiting blocks 15 is a concave structure design. Part of the surface of the second exhaust duct 82 is movably connected between the two limiting blocks 15. The inner concave surface diameter of the limiting blocks 15 is adapted to the diameter of the second exhaust duct 82, so that the second exhaust duct 82 can be placed between the inner concave surfaces of the two limiting blocks 15, thereby achieving a limiting effect on the second exhaust duct 82 after disassembly, facilitating the later connection between the connecting pipe 83 and the first exhaust duct 81, and at the same time, achieving a supporting and protecting effect on the connecting pipe 83 to prevent the connecting pipe 83 from being compressed and broken.

[0025] like Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 and Figure 7 As shown, the battery cluster flame-retardant outer panel 1 and the top surface of the first mounting frame 5 are respectively provided with an opening 16 and an opening 2 52 vertically therethrough, and the opening 16 and the opening 2 52 are connected to each other. The opening 16 and the opening 2 52 are respectively located above the second exhaust duct 82 and the connecting pipe 83, which makes disassembly and assembly more convenient when maintenance is required on parts such as the connecting pipe 83 and the second solenoid valve 84 in the later stage.

[0026] like Figure 5 As shown, the second mounting bracket 6 is located outside the multiple groups of liquid cooling plates 3, and the second mounting bracket 6 is movably connected to the battery cluster flame-retardant outer plate 1. Multiple temperature sensors 11 are respectively installed on the left and right sides of the inner wall of the second mounting bracket 6, which is convenient for later inspection and maintenance of the temperature sensors 11 installed on both sides of the inner wall of the second mounting bracket 6. The multiple temperature sensors 11 are respectively close to the multiple groups of battery modules 4, so that when a thermal runaway accident occurs in a certain group of battery modules 4, the temperature sensor 11 close to the thermal runaway battery module 4 can detect the abnormal signal in the first time and send it to the first solenoid valve 74. The first solenoid valve 74 is used to control the fire pipe 72 and the fire-fighting agent nozzle 73 to achieve continuous spraying, thereby achieving fire extinguishing in the fastest time.

[0027] like Figure 2 and Figure 5 As shown, multiple gas sensors 12 are respectively located directly above the multiple groups of liquid cooling plates 3 and near the left and right sides, and multiple ventilation gaps (not shown in the figure) are vertically opened on the left and right sides of the multiple groups of liquid cooling plates 3. When the battery module 4 has thermal runaway and emits flammable and explosive gases, the hot gas flows upward through the ventilation gaps and contacts the gas sensor 12.

[0028] like Figures 1-6As shown, multiple battery cluster frames 2 are vertically provided on the left and right sides of the inner wall of the battery cluster flame retardant outer plate 1, and multiple groups of liquid cooling plates 3 are respectively located between the multiple battery cluster frames 2, and a distance is left between the left and right sides of the multiple groups of liquid cooling plates 3 through the battery cluster frames 2 and the inner side of the battery cluster flame retardant outer plate 1, so that the multiple groups of liquid cooling plates 3 can be stably located between the multiple battery cluster frames 2, which facilitates the arrangement and adjustment between the multiple groups of liquid cooling plates 3 and the multiple groups of battery cell modules 4 and the battery cluster flame retardant outer plate 1.

[0029] like Figure 1-Figure 5 As shown, multiple groups of liquid cooling plates 3 and battery cell modules 4 are alternately arranged in a tray shape from bottom to top between multiple battery cluster frames 2. The surfaces of the multiple groups of liquid cooling plates 3 are integrally formed with multiple blocks that are movable and snap-connected to the battery cluster frames 2, which changes the connection method between the liquid cooling plates 3 and the battery cluster, making the disassembly and assembly operations between the multiple groups of liquid cooling plates 3 and the battery cell modules 4 and the battery cluster simpler and more convenient.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tray-type flame-retardant battery cluster, comprising a battery cluster flame-retardant outer plate (1), characterized in that: The battery cluster flame retardant outer plate (1) is provided with a plurality of groups of liquid cooling plates (3) and battery core modules (4) on the inner side thereof, and the plurality of groups of battery core modules (4) are respectively located on the plurality of groups of liquid cooling plates (3). The battery cluster flame retardant outer plate (1) is provided with a first mounting frame (5) and a second mounting frame (6), the first mounting frame (5) is provided with an intervention component (10), and the second mounting frame (6) is respectively provided with a plurality of temperature sensors (11) for monitoring the temperature and gas content of the surrounding environment and a plurality of gas sensors (12); The intervention component (10) includes a fire protection system (7) for extinguishing the fire of the battery module (4) and preventing the regeneration of open flames, and a ventilation system (8) for timely exhausting flammable and explosive gases.

2. The tray-type flame-retardant battery cluster according to claim 1, characterized in that: The fire protection system (7) includes a fire protection pipe (72), a fire protection agent nozzle (73) and a first solenoid valve (74). The fire protection pipe (72) is embedded in the embedded inner cavity between the first mounting frame (5) and the battery cluster flame retardant outer plate (1). The inlet end of the fire protection pipe (72) is used to communicate with a water source. A plurality of fire protection agent nozzles (73) are installed on the fire protection pipe (72) at intervals. The first solenoid valve (74) is installed at the inlet end of the fire protection pipe (72). The temperature sensor (11) is electrically connected to the first solenoid valve (74). When the detection data of the temperature sensor (11) is greater than a threshold value, the first solenoid valve (74) is opened.

3. The tray-type flame-retardant battery cluster according to claim 1, characterized in that: The ventilation system (8) includes a first exhaust duct (81) and a second exhaust duct (82), wherein the first exhaust duct (81) is connected to the first mounting frame (5) in a transverse direction, and the second exhaust duct (82) is connected to the flame-retardant outer panel (1) of the battery cluster. The first exhaust duct (81) and the second exhaust duct (82) are connected via a connecting pipe (83), and a second solenoid valve (84) is also installed on the connecting pipe (83). A fan is also installed on the first exhaust duct (81), and a plurality of gas sensors (12) are electrically connected to the second solenoid valve (84) and the fan. When the gas sensor (12) detects flammable and explosive gas, the second solenoid valve (84) and the fan are turned on.

4. The tray-type flame-retardant battery cluster according to claim 2, characterized in that: The fire protection pipe (72) is designed in an S-shaped structure, and the fire protection pipe (72) is located on the back of the multiple groups of battery core modules (4).

5. The tray-type flame-retardant battery cluster according to claim 3, characterized in that: The left and right sides of the inner wall of the battery cluster flame-retardant outer plate (1) are both connected to limiting blocks (15), and the side view of the limiting blocks (15) is concave in structure, and part of the surface of the second exhaust duct (82) is movably connected between the two limiting blocks (15).

6. The tray-type flame-retardant battery cluster according to claim 1, characterized in that: The battery cluster flame retardant outer plate (1) and the top surface of the first mounting frame (5) are penetrated by an opening 1 (16) and an opening 2 (52), the opening 1 (16) and the opening 2 (52) are communicated with each other, and the opening 1 (16) and the opening 2 (52) are respectively located above the second exhaust duct (82) and the connecting pipe (83).

7. The tray-type flame-retardant battery cluster according to claim 1, characterized in that: The second mounting frame (6) is located outside the plurality of liquid cooling plates (3), and the plurality of temperature sensors (11) are respectively mounted on the left and right sides of the inner wall of the second mounting frame (6).

8. The tray-type flame-retardant battery cluster according to claim 1, characterized in that: The plurality of gas sensors (12) are respectively located directly above the plurality of liquid cooling plates (3) and close to the left and right sides, and a plurality of ventilation gaps are vertically provided on the left and right sides of the plurality of liquid cooling plates (3). When the battery module (4) experiences thermal runaway and emits flammable and explosive gases, the hot gas flows upward through the ventilation gaps and contacts the gas sensors (12).

9. The tray-type flame-retardant battery cluster according to claim 1, characterized in that: A plurality of battery cluster frames (2) are vertically provided on both left and right sides of the inner wall of the battery cluster flame-retardant outer plate (1); a plurality of groups of liquid cooling plates (3) are respectively located between the plurality of battery cluster frames (2); and a distance is left between the left and right sides of the plurality of groups of liquid cooling plates (3) and the inner side of the battery cluster flame-retardant outer plate (1) via the battery cluster frames (2).

10. The tray-type flame-retardant battery cluster according to claim 1, characterized in that: Multiple groups of the liquid cooling plates (3) and the battery core modules (4) are alternately arranged in a tray-like manner from bottom to top between the multiple battery cluster frames (2).

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